^^
The -m parameter in FreeArc specifies the compression method to be used when making your archives.
Methods can be internal methods built into FreeArc or they can be defined in arc.ini as external compressors.
In your case, it looks like precomp and srep are external compressors whereas you are using FreeArc's internal lzma compressor.
Secondly, when you have methods with colons after their name, this is a way of defining parameters for that compressor at runtime.
For example, the oggre compressor by ProFrager, arc.ini would look like this:
Code:
[External compressor:oggre]
header = 0
packcmd = {compressor} {options} $$arcdatafile$$.tmp $$arcpackedfile$$.tmp
FreeArc has many internal constants, two of which I have shown above.
{compressor} instructs FA to look for oggre.exe. It simply fills the {compressor} with the name defined at the start of the entry.
{options} is where we pass our arguments at runtime. For example, if I used -moggre:s3, FA would translate the s3 to -s3 and use that parameter for oggre.exe.