Thanks for the info about the Regressin Catty1. I checked it out and learned more about it. It says that if the Regressin is to be used in conjunction with surgery that it should be given 2 weeks prior to the surgery and then up to 3 times after the surgery. We don't have the time (or I should say, Tiger doesn't have the time) to postpone this surgery so we can't opt for this. Also, the remaining injections would need to be given at the tumor site which would require the specialized endoscopic equipment that my vet has but it is quite the ordeal getting Tiger sent over there by car and then by plane and would be expensive above and beyond the cost of the drug itself. There is also some information in there that stated that it is not effective on all types of tumors but it didn't go into detail with regard to which tumors. The S.C.C. tumor is the most aggressive with the poorest outcome and it's my guess that this is probably one of the tumors that it may not work well with.
I wonder if there is a similar drug that could be given post op without having to go directly into the tumor site itself. That way my local vet could order it and give the injections herself without the aid of endoscopic equipment.

But, I'm definitely going to use a multi faceted and aggressive approach to treating him once the tumor has been removed and I feel really hopeful that he will have some time with us. I will be using the non-steroidal anti-inflammatory suspension (Piroxicam) that also has the cancer fighting and tumor inhibiting properties to it every 48 hours and I will continue using the L-arginine and look into the Lysine. I didn't know about this one for cancer and will check it out. I also found some info today about red clover and something called p'au d'arco which is supposed to be helpful. I will also request a pain patch when I speak with them on Monday.
He's quite lethargic these passed two days so I've been telling him to hang on, help is on the way. Thanks again for your research on this and all your help. And thanks everybody for your well wishes for Tiggy. I'll post an update on Monday when I call in the hospital in the afternoon to check on him.