[NOT ENOUGH ITEMS CAN'T SPAWN ITEMS :(]

i can't do anything with NEI change. Still, it's possible that exactly MCPC is the problem, not sending data to client properly. But still, You can use NEI with OP looking like non-OP.

[NOT ENOUGH ITEMS CAN'T SPAWN ITEMS :(]

Nice... So main question is why are You posting it here? Post it on MCPC-Plus thread. But still, try what i said. If it won't work, just remove GroupManager. (when i have been using PEX, i even didn't known there is something named GroupManager, so shouldn't make any change for You if Your not using it "for a reason")

[Could not pass event PlayerInteractEvent to LWC]

The main thing is that i use BukkitForge (always updating to newest version, as of the moment 201) with Tekkit Lite 0.5.7, so i just can't have that error But however, good luck!

[Could not pass event PlayerInteractEvent to LWC]

Then Tekkit Lite or CraftBukkit++? (and isn't CaftBukkit++ outdated?) However, then try the bloodshot's fix in MCPC-Plus 1.4.7 thread. If it still won't work, install newest version of LWC that is available for Your server version instead of the newest that is available on Files / jenkins.

[NOT ENOUGH ITEMS CAN'T SPAWN ITEMS :(]

Really? Strange thing... Then uninstall PEX (but don't remove it's folder), install bPermissions and after reloading / restarting Your server type the following commands:

/permissions import pex

/permissions reload

On BukkitForge, PEX is making problems, so temporarily it's the best way. You shouldn't see any change with bPermissions (other than different commands...) and it is less buggy. (For example, last time using PEX on Tekkit Lite with BukkitForge, i noticed that PEX can't read Essentials permissions, then i changed to bPermissions and works perfect)

[Could not pass event PlayerInteractEvent to LWC]

I guess You use BukkitForge on Tekkit Lite? Because on MCPC that have overridden Tekkit Lite jar it's "different job"... Well. Completely remove LWC folder from plugins folder, download the latest BukkitForge from BukkitForge jenkins, and override the BukkitForge You have installed with the downloaded one. On the latest BukkitForge LWC should work perfect, at least for me works :-)

[NOT ENOUGH ITEMS CAN'T SPAWN ITEMS :(]

NEI will sadly work only with Opped users, but about red color of Your name, it's easy to fix that! Essentials adds it. Go to Your plugins folder, then Essentials folder, open config.yml and set ops-name-color to 'none'. (Should then be ops-name-color: 'none')

[Dropped item goes to boots slot, then disappears]

Sorry for "digging the topic up", but maybe it will help someone...

The bug is related to changing from CraftBukkit engine to Vanilla engine. Tekkit Lite is Vanilla engine, so it doesn't support CanPickUpLoot value that CraftBukkit sets to 1, so using NBTEdit You have to modify Your players files ([world name]/players folder) changing CanPickUpLoot from 1 to 0 in every of the players files.

So simply, You can fix it by two ways. 1, simple one but clears items of Your players: Just delete all files from players folder. 2, simple too but boring way that won't delete Your players items: Download NBTEdit (search in Google, You'll find) and in every file in the players folder modify CanPickUpLoot value to 0.

Ah, and i'm sorry for bad English, i am from Poland :-)