Classic ASP 'SagePay Server' Conversion

I have built a custom e-com store built in Classic ASP (VB Script). I already have a Direct Integration of SagePay but would like to change this to a Inframe Server integration. I cannot give any FTP access, I would just be looking at having the specific Classic ASP code written for me to integrate myself. I just need the code that can handle sending information to SagePay and the code that can handle the return response. If you have done previous SagePay integrations in Classic ASP I would like to hear from you.