Merging members of different softwares

[afe]

Hello, I have a gallery installed on my website, along with my smf forum, and an arcade, however, I was wondering if it is possible to merge my members of all those categories and make them have the same accounts when signing up, and the sign up is one page for the forum, arcade and gallery. Please and thank you!

[BLiZZaRD]

I hope you have SMF 1.1.4 I assume you also have SMF Arcade (you should have Erics Arcade though, it's so much better and easier to use) and which gallery do you have?

[afe]

Yes, I have SMF, however, I have ArcadeBuilder.net, and 4homepages.de