Referring to the most recent picture in the thread, you've got 5 pullies. Let the top be A, B and C from left to right. The bottom two we'll call D and E from left to right.
Try to imagine this:
Right now you have one pulley system, let’s turn this into two pulley systems. A, D, and B are the left pulley system; C and E are the right pulley system.
Mentally, lets cut your pulley wire, in half, at pulley B and then lets pretend it magically grows 4' longer, or so (the wire that'd be hanging from pulley A). That gives you your independent left pulley system
Where we've now got hanging wire for the right pulley system, because we cut the wire in half at B, install an additional eye hook near the B pulley location and secure your wire there. Take pulley C and relocate it right next to pulley B. You now have an independent right pulley system.
By adding one more eye hook and a few feet (whatever's necessary for your application) of wire you can have a uniform lifting system with ease. Well, assuming my explanation makes sense anyways. Simply secure the two wires together somewhere to the right of pulley C, so when you pull the wires they move uniformly. Plus, you won't have to worry about uniform distribution of the weight

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HTH!