I skipped 1.2, can I go directly to 1.3? Worst case scenario for me is I start from scratch and just import my wallet.
Just install 1.3 and run it, the wallet.dat location is the same for all versions so no need to import anything, just leave it where it is.
About mining, I should have mentioned that with getblocktemplate and solo mining you need to provide a coinbase address for the first transaction in the block, that's the one with your reward for minting it.
For example:
nsgminer --neoscrypt -w 128 -I 13 -o http://127.0.0.1:9999 -u username -p 6bjlvC5KKSjVyig5 --no-getwork --no-stratum --verbose --text-only --coinbase-addrH5CbckdUxqaRmthG9LoHYkBNJGvXmbDdHE
guncoin.conf would look like the following.
rpcuser=username
rpcpassword=6bjlvC5KKSjVyig5
rpcallowip=127.0.0.1
server=1
rpcport=9999