For those wanting to try the NEW HL2-CTF 1.2 mod, head along to Half Life 2 CTF Homepage.

This modification will allow you to play CTF in Half Life 2 (Durrrr!)

What's new in Beta 1.2 :-

Maps:
Added ctf_gunshot
Updated ctf_2fort_lite
Updated ctf_curved
Updated ctf_trainingday
Updated ctf_lambda_bunker

Features/Tweaks:
Added ctf_respawndelay for admins to set player delay before respawn
Added ctf_warmup to allow warmup mode (set to # seconds of warmup)
Re-enabled sprint and added walk/run speed difference
Added extra scoreboard stats for captures, returns, and flag carrier kills
Added cl_autoweaponswitch cvar to not switch weapon on pickup
Added auto-team balance
Added second default key (M) to open team selection menu
Added team selection reminder text to the spectator menu
Tweaked SMG and pulse rifle damage
Restored falling damage to Alpha level
Made rockets dumb fire only
Changed default spawn weapon to smg from gravity gun
Improved HUD
Once you drop the flag, you can't pick it up for 3 seconds

Bug Fixes:
Fixed bug that could cause crash immediately on joining a server
Fixed intermission respawn bug allowing players to kill after map is over
Changed default sk_healthkit value to 25
Fixed ctf_return_flag entity
Fixed bounding box on flag being too big
Fixed incorrect RPG weight

Ive not tried the new version yet, so I won't comment.