vTiger customization

We are a small publishing company with just a couple of sales people but we think that vTiger can be a usefull aid in selling advertising. Unfortunately vTiger is product based but advertising are services, so that would need to bechanged. We do not need to keep stock so that can be turned off. The sales cycle is good until the point we have submitted a quotation. After the Quotation has been accepted we will make a contract with the client for a varying number of month. And thats it, we do not need invoicing or sales orders, Accounting is separate. We would need to see expiring contracts (report?). Quotations and Contracts should print to our specifications. just a bit tweaking, nothing major really. Feel free to contact me if you are unclear. best,