You need Manhunt toolkit, MDL Editor aswell as TEX Editor to install this. 

For the sign to spawn on the level:
unpack entity_pc.inst from the A06_CIA_Trap level with manhunt toolkit
move the 632#StreetSignsFix.json into the unpacked folder and pack it again.
replace the packed file with the original 

For the sign model:
Add the streetsignsfix.mdl to the models in modelspc.mdl with MDL Editor

Do the same for the Texture and the modelspc.tex file with TEX Editor

unpack resource3.glg with Manhunt toolkit

It will now be readable. You dont need to pack this file again you can just use the readable resource3.glg file,
add the record from the provided txt file to the resource3.glg file.







