Chaining is an effective way to avoid MySpace daily limits on messages count. For example, you can not send more than 350 friends requests daily on MySpace from the same sender account, however, you can use unlimited senders accounts count.  

So, if you have 3 MySpace accounts (A, B, C) and enable chaining, MySpace Promoter can send 350 friends requests from A, than 350 ones from B and 350 ones from C automatically. You have not to do something special. You just enter 3 MySpace accounts at senders list and press Post, and all efforts on chaining are made by MySpace Promoter. Chaining is really the way to kill any limits.

Chaining is enabled by default. The only thing you need to use chaining with MySpace Promoter is to enter all your MySpace accounts to senders list and mark them as active ones. When you did it, any posing task will use chaining.

If you want to disable chaining for any reason, open Send your messages and ads > Options tab and change What senders MySpace accounts to use parameter from Use all selected accounts to Use the first selected account. Chaining will be deactivated in this case, and even if you mark more than one sender account as active chaining will not work. Alternative way is to mark only one MySpace account as active. Deactivated (unchecked) accounts are never used in chaining.