will you be updating your mods to 1.6.4?
For the most part, his mods should already work in 1.6.4 as the big change that I am aware of in 1.6.4 was that Mojang altered the code that controls how structures (fe. strongholds) generate and none of Myrathi's mods generate structures in the world, but I did test some of them just to be careful
ChargePads - Not entirely sure as there have been a great number of changes in IC2
FinndusFillies - I haven't tested it fully, but it seems to load up the game just fine, so my guess is: yes, it should work.
FlatSigns - I'm really not sure on this one as I've never tested it myself
InfiniBows - Again, I haven't tested it myself so I wouldn't be able to tell you
ObsidiPlates - I know this works in 1.6.4
Switches - This works in 1.6.4, including pressing and depressing them with sticky pistons