Minor readme updates.

README

@@ -744,7 +744,8 @@ A: Cgminer is being packaged with other trojan scripts and some antivirus
 software is falsely accusing cgminer.exe as being the actual virus, rather
 than whatever it is being packaged with. If you installed cgminer yourself,
 then you do not have a virus on your computer. Complain to your antivirus
-software company.
+software company. They seem to be flagging even source code now from cgminer
+as viruses, even though text source files can't do anything by themself.
 
 Q: Can you modify the display to include more of one thing in the output and
 less of another, or can you change the quiet mode or can you add yet another

SCRYPT-README

@@ -15,7 +15,8 @@ Thanks to some innovative work by Artforz and mtrlt, this was proven to be
 wrong. However, it has very different requirements to bitcoin mining and is a
 lot more complicated to get working well. Note that it is a ram dependent
 workload, and requires you to have enough system ram as well as fast enough
-GPU ram.
+GPU ram. If you have less system ram than your GPU has, it may not be possible
+to mine at any reasonable rate.
 
 There are 5 main parameters to tuning scrypt, 2 of which you MUST set, and
 the others are optional for further fine tuning. When you start scrypt mining
@@ -123,7 +124,7 @@ see that it increases hashrate AND utility WITHOUT increasing your rejects.
 
 Suggested values for 7970 for example:
 export GPU_MAX_ALLOC_PERCENT=100
---shaders 2048 -g 5 --gpu-engine 1135 --gpu-memclock 1375
+--thread-concurrency 8192 -g 4 --gpu-engine 1135 --gpu-memclock 1375
 
 
 ---