[myblackf150]

I managed to do it but the sidebar and contents are misaligned when using buddypress ( BP compatibility ) .
Buddypress templates had some instruction on how to fix the alignment but I can’t make heads or tails on what they mean since the buddypress templates involve divs called content and sidebar but retromania doesn’t.
Any help would be greatly appreciated.

[@mercime]

Following is a walkthrough of the Motion theme with the BP Template Pack https://codex.buddypress.org/theme-development/bp-template-pack-walkthrough-level-easy-2/ .
Per example there, you need to copy Retromania’s HTML structure onto the 13 files within the BP folders transferred to your Retromania theme folder in server. Save revisions and upload to server. You need to copy some styling from bp-default and adjust to taste.