Oscommerce small CCGV +Affiliate fix

I m running oscommerce 22rc1 heavily modified i have recently added the CCGV (gift voucher contribution) + osc_affiliate and even if the main function are running properly as you can guess i m experiencing some difficulties to have these two last contribution in perfect working order. on the CCGV contribution - the issue comes to the checkout process when i want to pay using the voucher balance. if the voucher balance if bigger than the amount to pay: on the [login to view URL] page i need to click many times on the "to be used from gift vouchers" and "continue"before to be able to pass to the next page "checkout_confirmation.php" otherweise i m just redirected to the same page with the error message in the url: [login to view URL] But in the same time as i said if my voucher balance is higher than the amount that i have to pay the payment methode become grey as soon as i check the "to be used from gift voucher" wich is normal - but to be redirected many time to the same page before to be able to pass to the next page is not. and in that case on the "checkout_confirmation.php" because the amount to pay is 0.00 i m not redirected to paypal on the "confirm order" link but the link doesn t work and i can t finish the checkout process. second case: if the voucher balance is lower than the amount to pay: nearly the same issue appear: first time on the "checkout_payment.php" - payment methode paypal selected - "to be used from gift voucher" selected when i click on the "continue" link at the bottom i am redirected to the "checkout_confirmation.php" but the vouvher balance is not used. so i have to go backward (back space or footer link "payment information") so once back on the "checkout_payment.php" for the second time i reselect my payment methode and tick the "to be used from gift voucher" and then it is working. so as you imagine i want it to work all the time straight away. and in the affiliate module everything seams to work fine i have my banners - affiliates can create account banner and everything i have got the Clickthroughs report - when i clcik on an affiliate banner i mredirected to my website at the correct page with an url like that "?affiliate_banner_id=1&ref=4" but then if a sale is done nothing either appear in the "admin/affiliate_sales.php" or in the catalog "affiliate_sales.php". so i do not know if that is just a configuration issue or anything else. because the support/manual/explanation on this contribution is not very good i couldnot find anything about it. so as a lot of people on this website my budget is quit tight. and i will give you access to the FTP and access to error_log so you wont have to waste you time to download the whole website and try it on you local server or other account. like that i will also be sur sure that your changes will work on my server. i will have to know every single files that you had to change or edit or eventually added. i will need you to tell me exactly everything that you changed in every single files that you had to edit as well (lines edited/changed/removed/added) - and the names of the files. if you had to change some thing in the oscommerce configuration i will have to know what you had to change and why to have it working. - same thing if for some reason you had to edit some SQL tables. i want someone very confident with oscommerce and who has allready installed successfully these two big contribution many times. i would need someone who will aslo test and re-test that the changes that he does and come back to me with the issues fixed and be sure that it doesnt conflict with my other contribution installed. it might do not be a big job for someone experienced in oscommerce and CCGV + osc affiliate, as most of the job is done - that is just to see/identify the issues and fixe them. i would like aslo to have a 30 days free support after job is done just to have time to be sure that everything is fine and 100% tested on my side all the brief is in this message and i hope that it is all clear enough. if you have any question please please feel free to contact me.