They are not compatible, there is no trick. The Cydia package lists the infini* products as conflicts:
ModMyi.com | SBRotator for 4.x
Conflicts: com.chpwn.infinidock, com.chpwn.infiniboard, com.chpwn.infinifolders, com.modmyi.multitaskingtime, org.thebigboss.appswitcherrotator, com.xsellize.appswitcherrotator, net.limneos.sbrotator
Tweet from limneos about it: Twitter
Maybe FolderEnhancher (which has some feature overlap with Infinifolders) would work, but that's yet another purchase.