Just wondering if I'm outta luck on this one

as I understand it, the only method to properly track conversions from PPC is to install code on the landing page to track it. If I'm a DTM does that essentially prohibit me from tracking with software?

I guess I can do it by hand in the begining if I have to, but I don't know if down the road a custom interface combining the stats from each merchant with the correlating PPC campaigns is possible.

What say ye?