Thanks for the responce Mauti!
1) Regarding Desert Siege:
Ok, great I should put Desert Siege back in. That is probably one of my problems. I was guessing that the top mod in the list was the higher priority & I could not get Desert Siege to relinquish that position. I will leave Desert Siege in not worrying about it being higher in the list and assume that using the increase priority button will make the Mod the higher priority.
2)Regarding Types of Mods:
I am not clear on what the difference is between Mission, Weapon and Complete Mods. (the categories listed in the Mac downloads area).
I did do the Mac upgrade to get Ghost Recon on the Mac to the same level as on PCs.
The mods I have in my mods file that show up in my mods under options in the game are:
// Mods Contents
NAME "DTD> Israel Defense Forces"
AUTHOR "DTD Pro Mod Team"
SUPPORT "
http://www.planetrainbowsix.com/dtd/"
VERSION "1.2a"
// Mods Contents
NAME?

??"SPV4"
AUTHOR?

??"SOTOMac, SOTOReco"
SUPPORT?

??"
mac@sotoclan.com,
reco@sotoclan.com"
VERSION?

??"4.0"
MULTIPLAYER???"Server-Client"
// Mods Contents
NAME "Navy SEALS 2.0"
AUTHOR "Piccolo"
SUPPORT "
chriscartman@hotmail.com"
VERSION "2.0"
MULTIPLAYER "Server-Client"
// Mods Contents
NAME

"Black Sun 3.0"
AUTHOR

"=DRAG="
SUPPORT

"
www.ravenmouth.org"
VERSION

"3.0"
MULTIPLAYER???"Server-Client"
I "loaded" these mods by physically draging and dropping their file folders into the the GR mods file.
The DTD Mod has worked best for me I have a Campaign running in Mission6. DTD is the only Mod.I have gotten beyond Mission1 in a Campaign. The other mods tend to crash the game between Mission1 and Mission2. DTD is listed as a weapons mod I believe. I think Black Sun is a weapons mod too.
SPV4 I got from a link that SOTOMac had on a post he made answering a post I made. SOTOMac suggested in an email that I just put the files in the Mods folder manually; his installer is for PCs he explained. I do not know if this is a weapons mod or what? I thought SOTOMac was a Mac user making Mac mods, but maybe Mac is just his name.
Navy Seals is listed as a Complete Mod. I am not sure what that means in terms of how to use it. I am guessing that "Complete" Mods change things that Weapons mods do not. It seems that Weapons mods may change things like skins and Complete mods change weapons though so whats the difference?
Thanks again for the help.