Hi everyone, I'm new here, I'm trying to plan a RTW trip (d'uh) and I'm trying to see if the route I have is possible, it looks like star alliance is the best bet, the travel agents have ranged from pretty good to possible special school escapees who saw a plane in a picture book once. Anyway heres my route, I think it should be ok but need some advice really, also I don't know airport codes they look like amino acid sequences for proteins, of which I have limited knowledge at best.

London to Mexico City

Mexico City to Quitto (probably via Miami)
(Overland to Lima)

Lima to Cusco
(Overland to Arica)

Arica to Punta Arenas
(Overland to Santiago)

Santiago to Auckland
(Overland to Queenstown)

Queenstown to Sydney

Sydney to Brisbane

Brisbane to Singapore
(Overland to Bangkok)

Bangkok to Ho Chi Minh City
(Overland to Vientiane)

Vientiane to Bangkok

Bangkok to London

Any help would be great, cheers, take care

Pete