Add
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Filter Doom so dragging DEH patches to it load and patch live
Clipboard
Copying of attributes from one thing to another
Check live transfer in of cheats - word rounding errors on 
 Wimp_Transfer code?
Add stand-alone patches (ie. basic stub)
For saving patches read original data from original engine, but
 compare against current - to prevent save / reload as default 
 type problems.
