Re: X-Payments 1.0.6 works with XC 4.5.4
Jeremy, I checked this and it looks like you are talking about "old lite interface" - it does work with 4.5.4 & 1.0.6 but it is the old one, not the new one. The improved iFrame integration works only in 4.5.5 & 1.0.6
I'll add a table of versions vs interface in our Knowledge base for better understanding.
VP of Business Development for X-Cart