Is SQL also 64 bit? If so, there's no need for AWE.
I'd drop the max memory down to 6GB. Letting SQL take just over 7 GB (the 7 is the size of the buffer pool, SQL also takes a small amount of non-paged memory) leaves the OS with very little and may cause problems.
High CPU may not be related to memory. It's most likely caused by poorly written queries and/or poor indexing. Is doing an optimisation exercise on the SQL databases possible, or is this vendor apps?
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)SQL In The Wild
: Discussions on DB performance with occasional diversions into recoverability
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