Not off the top of my head - I think I'd recommend using the parliamentarian list as it has access to cuirassier armoured trotters which were a more major feature of the TYW than they were of the ECW. But I'd also add in the ill armed recruits from the Royalist lists to give you scope for scratch companies or peasant units which appear both early in the war and are a feature of the anti-Imperialist and anti-Spanish revolts in the mountains. We've found the ECW 4 'uses' of powder give a flavoursome game which avoids being an exercise in blasting away at maximum range - that said I think TYW armies did tend to be better supplied. If you agree that powder was in plentiful supply then I'd just ignore powder use, or you could introduce limitations by either increasing points to allow unlimited ammo or decreasing points and limiting numbers of shots to demonstrate poorer logistics! If you stick to the percentages given at the start of the army list i don't think you'll go far wrong. Your other option is to look at it in a more BP way and research some forces and fight with them - ignoring the points system altogether and see how well you do with the 'real forces' Hope this helps Mike
There is a wargame called "1644" that shares a common heritage with WHECW. They utilize the same basing, etc. 1644 is mostly aimed at the English Civil War, but it also includes lists for the 30 Years' War. I'd recommend picking up a copy. It is a good game, and provides an interesting alternative to WHECW. Also, the lists for the 30 Years' War could easily be adapted to WHECW if you want to use the Warhammer rules.
There were a pair of articles in WI a few years ago which I was given by a friend yesterday - Very handy! I'll try to get them scanned in and if you PM me your email address i'll send them to you some time tomorrow!