TenAndie
mad_jock sums it up very well. Modular will be a much lower cost option given your experience already.
Your revailidation requirement is a test with an authorsed examiner. The content is as describend in AIC127/199 (White 378) and can be found on the following link
http://www.ais.org.uk/aes/pubs/aip/pdf/aic/4W378.PDF
I don't undersrtand why you need to go to the USA for hours building......you seem to have enough hours to meet the entry requirements for the CPL, although you didn't put your solo time down.
If most of your flying so far has been done in the USA and you are going to do the JAA CPL you would be better (imho) doing some time dual in the UK with an instructor on familiarisation with UK procedures RT and airspace, It will be less costly as mj says to do this with a PPL instuctor than trying to get up to speed during your CPL.
If you want to send me a PM (I work at LFS) I will be more than happy to discuss your options, impartially, and help you to get on track with your training.
jsf