I freely mix and match archetypes from .45A and almost all its supplements and Fantastic worlds with its. I use the Fantastic Worlds rules (almost the same as .45A with some minor tweaks on maybe three or four areas) because that's more my genre of interest, but yeah, they're all mixable - the only big difference is that the .45A grade 1s have an extra row of damage boxes. If you mix Gloire and FW or .45A, then you need to determine which character uses wswhich projectile-weapon/ammunition rules, but that's a fairly trivial matter.
I've got a set of blank template cards you can use for making up characters you can fit in a ccg card sleeve (Openoffice format) - PM me if you want them. They're made for FW, but can be trivially adjusted for the other games.