I have a video sharing script that has some problems talking to paypal. This needs to be fixed. An optional extra would be to provide an additional payment gateway. The fixes need to be replicated as I'll be doing more of these sites. Ideally, your fixes will mean I can do the replication to the other sites, but if that's not the case, then the other sites If they happen) will be at a reduced 'install only' rate.
Everything is up and running on my site, it's just the payment section that's not happening.
It appears that all the programming is PHP.