Kyle said in an interview with Linkin Park Argentina that he played in performances at Los Angeles and Arizona.
According to him, it can be assumed that he definitely played in these performances:
1999.08.27 Tempe, AZ
1999.08.28 Tempe, AZ
1999.09.02 Los Angeles, CA
Accordingly, in Fullerton, 7 days before the performance in Tempe (1999.08.27), in theory he also played.
The question remains, did Kyle play at 12 november 1999 in Fullerton, or was Ian Hornbeck already participating there (and did he perform with them at all)?
In general, it would be great if Kyle looking at the photos confirmed whether he played there. The person who interviewed him in 2011, in theory, should have remained his contacts.