Could someone please help me please. I've been working on this mod for the past several weeks, and its really became my baby. The last few mods I've tried I just gave up on, but this one has overcome all the problems they ran into. So, as you can guess, I've put alot of time and energy into this and would really like to see it finished. So...

With that said... every time I try and open my fing mod I've been working on, I'm hit with this image.

http://www.civfanatics.net/uploads10/load_error_-_%23.jpg

What do you do exactly ? New units, new tech, new civs ? Did you delete something ?

If you've done a lot of these things, you can try this to locate the problem:
Import 1 rule (with the Import function, File > Import) from conquest.biq. Launch the game. If it's still broken, import another rule. When it will work, note down the last rule set you've imported and you'll know where the problem is.

I bet you didn't add a pedia entry in the .biq.
For example, if you add the Settler to the game you have to:
1. Add PRTO_Settler in the biq
2. Add
#ICON_PRTO_Settler
art\civilopedia\icons\units\00settlerlarge.pcx
art\civilopedia\icons\units\00settlersmall.pcx
in the units part of pediaicons.txt

and
3. Add
#ANIMNAME_PRTO_Settler
Settler
in the unit animation part of the pediaicons.txt

I think you missed number 1 somewhere. :)