A group of opposition parties in Uganda have announced they intend to form a coalition in an attempt to defeat the Movement Party in the 2006 elections.
Museveni and his Movement system have dominated Ugandan politics
The G7 in Uganda is set to include the Democratic Party, the Uganda People's Congress, the Conservative Party and the Reform Agenda.
President Yoweri Museveni has ruled Uganda since he came to power in 1986.
Political parties have been severely restricted under an arrangement known as the Movement system.
Following years of war, the system was designed to be all-inclusive and prevent the population being split along religious and ethnic lines, but in recent years there has been growing pressure for more democracy.
President Museveni has in recent months overseen the freeing up of political space and the ruling party itself has now registered to contest democratic elections in 2006.
However, the G7 parties have so far refused to register and have challenged the political parties act in court.
At a press conference this morning held by one part of this grouping, Conservative Party official John Ken Lukyamuzi expressed the need for unity.
He said G7 needed to take on board lessons to be learnt from neighbouring countries.
A coalition came to power in Kenya a year ago after many years of division, but in Tanzania the opposition has remained divided and has failed to gain power.
On Saturday a public rally is to be held in Kampala at which members of the G7 will be invited to speak.
The Conservative Party's Nsubuga Nsambu is the MP for the area where the rally is due to take place.
And while political rallies by unregistered parties are still banned under Ugandan law, the MP says he has informed the police.
Constitutionally Mr Museveni cannot seek a third-term, but his Movement have decided to seek the lifting of a two term limit for a serving president.