Open up the inventory xml file and in 3 different areas you will see:
<Pieces>Listbox:ACP_ProgressionList</Pieces>
<Pieces>STMLbox:ACP_ProgressionInfo</Pieces>
<Pieces>VerticalLayoutBox:ACP_ProgressionLayout</Pieces>
<Pages>Page:IW_InvPage</Pages>
<Pages>Page:IW_EIPage</Pages>
<Pages>Page:IW_AltCharProgPage</Pages>
temporarily change them to:
<Pieces>ACP_ProgressionList</Pieces>
<Pieces>ACP_ProgressionInfo</Pieces>
<Pieces>ACP_ProgressionLayout</Pieces>
<Pages>IW_InvPage</Pages>
<Pages>IW_EIPage</Pages>
<Pages>IW_AltCharProgPage</Pages>
Then you can load SidlWidl and edit.
Before you load EQ, change them back. Its the tag & colon thing they added for some annoying reason and feedback'd it plenty of times to put it back the way it was.
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Cliffnotes:
Backup the current Inventory Window, Search and Replace the following tags with nothing, save, and use in SidlWidl. When you have finished, use a
compare program to compare your Backed up version to your new one to find the tags you need to put back. Takes only a few minutes this way.
Temporarily, remove all instances of the following from the XML:
VerticalLayoutBox:
Screen:
Page:
TileLayoutBox: