You don't say which version of Trainz your have problems with nor have you given the kuid numbers of the faulty assets, so I assume your problems are in TS2009 and I'll try to help you to the extent possible with out additional information. In general, all corrections are made using CM2, finding the kuid and right click and selecting Edit - Edit in Explorer.
KB rooster
ignore warnings
Start CM2, find the KB rooster, open for Edit in Explorer. Double click the config.txt file and find the 2 tags (A tag is the first word in a line). Delete the entire line. Sasve and commit.
Irrigation pump station
This asset has a texture applied in a manner not allowed in TS2009. To correct it you'll need to download and install PEV's PM2IM utility. Get it here
http://www.members.optusnet.com.au/~villaump/pevsoft.htm
Coal2BayOp PRR
Open it for Edit in Explorer. Double click the config.txt file. Scroll down to the queues section and find:
product-kuid <kuid:44179:60013>
allowed-categories
{
0 <kuid:44179:60013>
}
and change 0 <kuid:44179:60013> to 0 <kuid:-3:10040>
Close config.txt file and save.
Double click the nw_hopper_body folder. Double click unload_doors folder. Delete body_art.texture.txt. Close and commit.
Restaurant
Open it for Edit in Explorer. Double click the nighlight folder. Delete the fence1-fence2.texture.txt file. Close and commit.
CAT950G logger
Open for Edit in Explorer. Double click the lights folder. Delete metal_30.texture.txt file. Close and commit.
OBRunaboutRD
Open for Edit in Explorer. Make a copy of ob boatred.tga and save it as ob boat.tga. Double click the ob boatred.texture.txt file. Change ob boatred.tga to ob boat.tga. Saveas ob boat.texture.txt. Close and commit.
notellmotel
Open for Edit in Explorer. Double click the config,txt file. Find the category-region-0 tag and change "to US" to "US". Save the file. Double click the night folder. Delete the notellnightwin.texture.txt file. Close and commit.
Power Cable
can't help
Cotton-trailer empty
cotton-trailer empty,<kuid2:50567:25027:4> is the current version and is built-in into TS2009.
Jail
Open for Edit in Explorer. Open the window.bmp in a graphics editor to change its size to 32 by 32 pixels.
water04
Open for Edit in Explorer. Double click the config.txt file and insert a space between build and 1.3. Save and commit.
sea1
Open for Edit in Explorer. Double click the config.txt file and insert a space between build and 1.3. Save and commit.
greyhound stop1
Open for Edit in Explorer. Double click the greyhound_stop_1_nightwindows folder. Delete the bussstatin1.texture.txt file. Close and commit.
JJS Grass
Open for Edit in Explorer. Double click the config.txt file and insert a space between build and 1.3. Save and commit.
Billboard - RC Cola lit
This asset has a texture applied in a manner not allowed in TS2009. To correct it you'll need to download and install PEV's PM2IM utility. Get it here
http://www.members.optusnet.com.au/~villaump/pevsoft.htm
Bob