cbacani
Why not use sme8beta4 ?
It is well advanced and all basic functionality is working, at least as good as sme7.4
It also has php5 & mysql5 & I think LDAP integration is more advanced than for sme7.4.
Don't be put off by the beta tag, sme betas work very well. You will be surprised how well once you start using it.
Not all contribs are guaranteed to work at this stage, although many will, so test any must have applications first on a test sme8 server.
The request to use sme8beta4 has come from a key developer so they must think it's well enough advanced to be used with a fair degree of confidence.