Apple Software won't open now (Safari, Mail, Dashboard)

Question

I downloaded iTunes and Quicktime updates yesterday. I went to open Apple Mail, and it opened all my previously opened messages, and then automatically closed. Safari did the same thing. It opened, briefly, but then automatically closed. Both apps told me an error occurred and asked if I wanted to Close or Reopen. Reopen just duplicated the problem.
This morning I went to Dashboard, and one by one, all my open dashboard items game me an error. Now when I switch to dashboard, my board is empty.
I used Disk Tools to repair permissions and restarted. No change.
I have a second internal drive with 10.4.9 on it so I restarted off that drive. My intention was to run first aid, but first I wanted to update to the same os version, so did a software update to get it to 10.4.10. It updated the security patch OK, but the 10.4.10 update gave me an error and said it could not be installed. I tried it again. Same error. I then tried to restart, and that system, which was VERY clean system, now doesn't even start up. I had to startup off of a CD to get back to my original system, which, still won't let me open Safari or Apple Mail.
Please help!! Thank you!

Answer 1

Nice thought! But alas I have 18 gig available on my primary 140 gig internal drive. I should also note that the applications also have problems under my other user accounts. However all users share the same applications folder. I tried copying just Safari app to user applications folder, but it still crashes. I checked the console log and both safari and mail are indicating crash on Thread 0. Safari crash reporter log shows;
Thread 0 crashed with PPC Thread State 64:
srr0: 0x00000000959a5c08 srr1: 0x100000000208f030 vrsave: 0x0000000000000000
cr: 0x24024404 xer: 0x0000000000000000 lr: 0x00000000959a5bfc ctr: 0x0000000095bf865c
r0: 0x00000000959a5b28 r1: 0x00000000bfffdd70 r2: 0x0000000005e01068 r3: 0x0000000001859c00
r4: 0x00000000066057c0 r5: 0x0000000004cbd760 r6: 0x0000000005e11b8c r7: 0x0000000095952e20
r8: 0x0000000005e01008 r9: 0x0000000005e11b88 r10: 0x00000000a59e87c8 r11: 0x0000000044024404
r12: 0x0000000095bf865c r13: 0x0000000000000000 r14: 0x0000000000000001 r15: 0x0000000000000001
r16: 0x0000000000000000 r17: 0x0000000000000000 r18: 0x0000000000005a1b r19: 0x00000000bfffe220
r20: 0x0000000000000000 r21: 0x00000000a5955334 r22: 0x0000000000000001 r23: 0x00000000066057c0
r24: 0x00000000bfffdf30 r25: 0x00000000bfffdfa0 r26: 0x00000000066057c0 r27: 0x0000000004cbd760
r28: 0x0000000004cbd760 r29: 0x00000000066057c0 r30: 0x0000000005e11bb0 r31: 0x00000000959a5764